National Semiconductor | High-performance Analog

 

 LM285-1.2   
Micropower Voltage Reference Diode 		Click link to Download

Features

  • ±1% and 2% initial tolerance
  • Operating current of 10μA to 20mA
  • 1Ω dynamic impedance
  • Low temperature coefficient
  • Low voltage reference—1.235V
  • 2.5V device and adjustable device also available
  • LM185-2.5 series and LM185 series, respectively

    • Description

    The LM185-1.2/LM285-1.2/LM385-1.2 are micropower 2-terminal band-gap voltage regulator diodes. Operating over a 10μA to 20mA current range, they feature exceptionally low dynamic impedance and good temperature stability. On-chip trimming is used to provide tight voltage tolerance. Since the LM185-1.2 band-gap reference uses only transistors and resistors, low noise and good long term stability result.

    Careful design of the LM185-1.2 has made the device exceptionally tolerant of capacitive loading, making it easy to use in almost any reference application. The wide dynamic operating range allows its use with widely varying supplies with excellent regulation.

    The extremely low power drain of the LM185-1.2 makes it useful for micropower circuitry. This voltage reference can be used to make portable meters, regulators or general purpose analog circuitry with battery life approaching shelf life.

    Further, the wide operating current allows it to replace older references with a tighter tolerance part.

    The LM185-1.2 is rated for operation over a −55°C to 125°C temperature range while the LM285-1.2 is rated −40°C to 85°C and the LM385-1.2 0°C to 70°C. The LM185-1.2/LM285-1.2 are available in a hermetic TO-46 package and the LM285-1.2/LM385-1.2 are also available in a low-cost TO-92 molded package, as well as SO and SOT-23. The LM185-1.2 is also available in a hermetic leadless chip carrier package.




    Typical Application
    *click for larger image


    		Connection Diagram
    *click for larger image



    Typical Performance
    click for larger image


     

    ParametersValues
    Initial Accuracy (+/-) Max 1 %
    Reference Voltage 1.235 V
    Tempco, max (ppm/C) 150 ppm
    Operating Current 0.01 mA
    Output Current 20 mA
    Temperature Min -40 deg C
    Temperature Max 85 deg C

    Datasheets
    TitleSizeDateOther
    Language
    LM285-1.2 Micropower Voltage Reference Diode294
    Kbytes    		30-Jan-08日本語  

    Part Number(s)
    (NSID)    		Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM285BXM-1.2/NOPB


    RoHS Status

    SOIC NARROW    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    ARROWWorldwide59
    AVNET-EMWorldwide55
    DIGI-KEYWorldwide0
    MOUSERWorldwide380
    TAYLORAmericas59
    		$0.99 each at 1K+ pcsrail
    of
    95
    LM285BXMX-1.2/NOPB

    LM285BXMX-1.2

    RoHS Status

    SOIC NARROW    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    ARROWWorldwide2500
    DIGI-KEYWorldwide0
    TAYLORAmericas2500
    		$0.99 each at 1K+ pcsreel
    of
    2500
    LM285BXZ-1.2/NOPB


    RoHS Status

    TO-92    		Full production
    Lead Time: 8 weeks

     
    DistributorRegionQty
    ARROWWorldwide70
    AVNET-EMWorldwide1383
    DIGI-KEYWorldwide0
    MOUSERWorldwide1685
    TAYLORAmericas70
    		$0.96 each at 1K+ pcsbox
    of
    1800
    LM285BYM-1.2/NOPB


    RoHS Status

    SOIC NARROW    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    AVNET-EMWorldwide424
    DIGI-KEYWorldwide347
    MOUSERWorldwide465
    		$0.80 each at 1K+ pcsrail
    of
    95
    LM285BYMX-1.2/NOPB

    LM285BYMX-1.2

    RoHS Status

    SOIC NARROW    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    MOUSERWorldwide2500
    		$0.80 each at 1K+ pcsreel
    of
    2500
    LM285M-1.2/NOPB


    RoHS Status

    SOIC NARROW    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    AVNET-EMWorldwide1238
    DIGI-KEYWorldwide1385
    MOUSERWorldwide939
    NEWARKAmericas565
    RS COMPONENTSWorldwide10
    		$0.28 each at 1K+ pcsrail
    of
    95
    LM285MX-1.2/NOPB


    RoHS Status

    SOIC NARROW    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    ARROWWorldwide5827
    AVNET-EMWorldwide999
    DIGI-KEYWorldwide0
    MOUSERWorldwide2500
    TAYLORAmericas5827
    		$0.28 each at 1K+ pcsreel
    of
    2500
    LM285Z-1.2/NOPB


    RoHS Status

    TO-92    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    ARROWWorldwide3122
    AVNET-EMWorldwide1800
    DIGI-KEYWorldwide2298
    MOUSERWorldwide1300
    TAYLORAmericas3122
    		$0.28 each at 1K+ pcsbox
    of
    1800
    LM285H-1.2/NOPB

    LM285H-1.2

    RoHS Status

    TO-46    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    ARROWWorldwide115
    DIGI-KEYWorldwide0
    TAYLORAmericas115
    		$4.50 each at 1K+ pcsbox
    of
    1000

    All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

    Moisture Sensitivity Level Data for LM285-1.2.

    A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

    National's certificate of product compliance for LM285-1.2 is located at RoHS Status.

    Part Number(s)
    (NSID)    		Weight
    (milligrams)    		TypePinsMSL RatingPeak ReflowRoHS
    Status    		CAD SymbolsModelsPackage
    Marking
    Format
    LM285BXM-1.2/NOPB

    		69.761
    70.001
    		SOIC NARROW81260DetailN/AN/A
    		NSZXTT
    285BX
    M1.2
    LM285BXMX-1.2/NOPB

    LM285BXMX-1.2
    		69.761
    70.001
    		SOIC NARROW81
    1    		260
    235    		DetailN/AN/A
    		NSZXTT
    285BX
    M1.2
    LM285BXZ-1.2/NOPB

    		201.662
    202.003
    		TO-9231NADetailN/AN/A
    		NSXYTT
    285BX
    Z-1.2
    LM285BYM-1.2/NOPB

    		69.761
    70.001
    		SOIC NARROW81260DetailN/AN/A
    		NSZXTT
    285BY
    M1.2
    LM285BYMX-1.2/NOPB

    LM285BYMX-1.2
    		69.761
    70.001
    		SOIC NARROW81
    1    		260
    235    		DetailN/AN/A
    		NSZXTT
    285BY
    M1.2
    LM285M-1.2/NOPB

    		69.761
    70.001
    		SOIC NARROW81260DetailN/AN/A
    		NSZXTT
    LM285
    M1.2
    LM285MX-1.2/NOPB

    		69.761
    70.001
    		SOIC NARROW81260DetailN/AN/A
    		NSZXTT
    LM285
    M1.2
    LM285Z-1.2/NOPB

    		201.662
    202.003
    		TO-9231NADetailN/AN/A
    		NSXYTT
    LM28
    5Z-1.2
    LM285H-1.2/NOPB

    LM285H-1.2
    		257.344
    257.614
    		TO-4621
    1    		NA
    NA    		DetailN/AN/A
    		NSXYTTE# LM285H1.2

    All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

    Moisture Sensitivity Level Data for LM285-1.2.

    A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

    National's certificate of product compliance for LM285-1.2 is located at RoHS Status.

    CAD Symbols and Models
    N/A
    		 Models
    N/A


    Reliability Metrics
    Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
    LM285BXM-1.2SLM04404600353250011002356520
    LM285BXMX-1.2SLM04404600353250011002356520
    LM285BXZ-1.2SLM04404600353250011002356520
    LM285BYM-1.2SLM04404600353250011002356520
    LM285BYMX-1.2SLM04404600353250011002356520
    LM285M-1.2SLM04404600353250011002356520
    LM285MX-1.2SLM04404600353250011002356520
    LM285Z-1.2SLM04404600353250011002356520

    Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

    For more information on Reliability Metrics, please click here.


    All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

    Moisture Sensitivity Level Data for LM285-1.2.

    A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

    National's certificate of product compliance for LM285-1.2 is located at RoHS Status.

    [Information as of 9-Feb-2012]
    Copyright © 2011 National Semiconductor Corporation